Huron County, OH radon potential

Huron County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. Nationally that's the 91st percentile for radon potential — Huron County outranks 91% of every county EPA has rated.

How Huron County compares

Huron County, Ohio is home to about 58,168 people across 492.244 square miles. Averaged across its land area, Huron County runs about 118 people per square mile. Within its own EPA zone, Huron County is bigger by population than 74% of the counties that share it. EPA's geology-based Region 5 groups Huron County with 523 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Huron County's predicted average sits above EPA's own action level of 4 pCi/L — the concentration at which EPA recommends fixing a home — versus a national average around 1.3 pCi/L indoors and 0.4 pCi/L outdoors. That doesn't mean every Huron County house tests high — a zone is a county-wide prediction, never a single-home reading — but it's a reason to test sooner rather than let it wait.

Testing and mitigation in Huron County

A short-term test kit is the standard first step and typically costs far less than mitigation itself. If a test comes back at or above 4 pCi/L, a radon mitigation system for a typical home runs roughly $800–$2,500 (around $1,200 for a common single-family install), driven mainly by foundation type, not by county.

Find Ohio's state radon program

For Huron County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Huron County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. Use code RADONZONE-10OFF at checkout for 10% off.

Where Huron County's figures come from

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. Whatever zone Huron County carries, the zone explainer covers what it does and doesn't tell you about any one house.